植物冠層分析儀利用魚眼鏡頭和CCD圖像傳感器來獲取植物冠層圖像。通過專業(yè)軟件分析,獲得植物冠層的葉面積指數(shù)(LAI)和冠層其它的參數(shù);自動水平數(shù)字相機獲取150°的冠層圖像,手柄上24個PAR傳感器測量光合有效輻射并計算光斑。圖像法測量植物冠層,僅僅獲取一次冠層圖像即可,簡化了傳統(tǒng)能量法要一天定點多次測量的繁復(fù)工作;同時可以躲開障礙物,選擇合適測量點。
主要功能
? 測量冠層葉面積指數(shù)(LAI),光合有效輻射值,計算太陽光斑
? 可調(diào)節(jié)鏡頭聚焦適合不同高度的冠層測量,從低矮植物到林木均可使用
? 鏡頭自動水平,一次成像,測量不受天氣、光線影響,無需天空空白對照測量
? 無需在冠層頂部做參照測量
? 現(xiàn)場獲取植物冠層彩色圖像,并直接顯示和儲存,強大的冠層分析軟件功能,可以手動調(diào)節(jié)閾值、自動調(diào)節(jié)閾值(OTSU),現(xiàn)場評估冠層內(nèi)的太陽直接輻射透過系數(shù)或LAI分析空隙系數(shù)。
? 軟件設(shè)置天頂角和方位角
? 用戶可通過分析軟件進行天空和葉片進行顏色過濾
? 通過GPS和羅盤功能方便定位,在植物生長季過程定點重復(fù)測量
? 軟件進行屏蔽、躲開影響圖像計算結(jié)果的人影、天空等無用圖像
測量參數(shù)
? 植物冠層葉面積指數(shù)(LAI)
? 葉片平均傾角(MLA)
? 散射輻射透過率(Transmission Coefficient)
? 消光系數(shù)(Extinction Coefficient)、直接輻射透過系數(shù)(Transmission Coefficient)、葉片分布(Leaf Distribution)
? GPS定位信息(GPS Lock)
? 太陽光斑(Sunflecks)、光合有效輻射(PAR)
應(yīng)用領(lǐng)域
廣泛應(yīng)用農(nóng)業(yè)科學(xué)、林木科學(xué)和植物結(jié)構(gòu)分析等方面,研究植物葉面積指數(shù)與生產(chǎn)關(guān)系、林木的冠層指標、農(nóng)作物和林木的生長監(jiān)測;林木內(nèi)的光合有效輻射強度;對不同緯度林木的葉面積指數(shù)的變化,環(huán)境對植物觀察的影響,田間農(nóng)作物、樹林及低矮植物冠層測量
主要技術(shù)參數(shù)
? 鏡頭視角:150°廣角鏡頭
? 相機分辨:800萬像素,
? 交互界面:7”觸屏,6按鍵
? 測量時間:0.5 s
? 冠層分區(qū):天頂角劃分1~10;方位角劃分1~10
? 圖像分析:可對冠層圖進行調(diào)節(jié)、數(shù)據(jù)分析和編輯
? 工作環(huán)境:5-50℃, 0-100% RH(不結(jié)露)
? 操作桿:400mm
? PAR傳感器:24個
? 附加功能:GPS數(shù)據(jù)顯示
? 供電:>6小時
選購指南
手柄、魚眼鏡頭、操作說明、軟件和便攜式手提箱
林地測量模式
產(chǎn)地:美國CID
參考文獻
原始數(shù)據(jù)來源:Google Scholar
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